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REALITY SHOW OR TRUSTABLE IMPOSTORS ?. Alex Garcia-Alonso University of the Basque Country . Outline. Research environment Reality show or trustable impostor Recent research activities Your input & discussion. Research environment. Basque Country

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reality show or trustable impostors

REALITY SHOW OR TRUSTABLE IMPOSTORS ?

Alex Garcia-Alonso

University of the

Basque Country

outline
Outline
  • Research environment
  • Reality show or trustable impostor
  • Recent research activities
  • Your input & discussion

Chapel Hill, Oct. 23rd

research environment
Research environment
  • Basque Country
    • 4 Universities (90,000 students)
    • 12 Tech research centers (2,200 labor force)

Chapel Hill, Oct. 23rd

@ ceit 1982 1995
@ CEIT (1982-1995)
  • Technological Research Center
  • App. Mechanics Dpt. : comp. graphics
    • FEM : pre- post-processing
    • Interactive 3D visualization
      • Mechanisms analysis
      • Dynamics …
    • Collision analysis (RT mechanisms) …
  • Working for different companies
    • European Space Agency
    • MDI (Mechanical Dynamics Inc, Ann Arbor MI)
    • EADS …

Chapel Hill, Oct. 23rd

@ univ of the basque country 1996
@ Univ. of the Basque Country (1996- )
  • Teaching !!!
  • Technological Research centers
    • CEIT (258 Labor staff)
      • University of Navarre
    • Ikerlan (230 Labor staff)
      • MCC Cooperative group 250 companies -- 83,600 labor force
      • 44% Basque Country 37% Spain 19% international
    • Labein (356 Labor staff)
    • Vicomtech
    • EUVE …
  • Spin-offs +VR

www.landersimulation.com

www.simtechniques.com

Chapel Hill, Oct. 23rd

research environment6
Research environment

U. of the Basque Country

U. of Navarre

CEIT Vicomtech

U. of Deusto

Labein

Bilbao

San Sebastian

100 miles

diameter

Mondragon

MCC – Ikerlan

U. of Mondragon

Vitoria

EUVE

Chapel Hill, Oct. 23rd

skills research network
SKILLS research network

Multimodal Interfaces for capturing and Transfer of Skill

  • CEIT
  • Labein
  • Aalborg University
  • Commissariat à l'Energie Atomique - Laboratoire d'Intégration des Systèmes et des Technologies (CEA LIST)
  • DLR - Institute of Robotics and Mechatronics
  • Fraunhofer Institut für Graphische Datenverarbeitung
  • HAPTION
  • KUKA Roboter GmbH
  • OMG plc
  • PERCRO, - Italy [coordinator]
  • Queen's University of Belfast
  • Simonazzi S.p.A.
  • Technion - Israel Institute of Technology
  • UM1 - University Montpellier-1
  • University of Tampere

Chapel Hill, Oct. 23rd

enactive research network
ENACTIVE research network
  • Labein
  • CEIT
  • Scuola Superiore Sant'anna, PERCRO
  • Queen's University of Belfast Institut National Polytechnique de Grenoble
  • University of Exeter
  • Lunds Universitet
  • Université Technologique de Compiègne
  • Uppsala Universitet
  • Institute of Robotik und Mechatronik
  • Hasselt University
  • Faculty of Music, McGill Univ.
  • University of Minnesota
  • Max-Planck Gesellschaft zur Foerderung der Wiss. E.V.
  • Université de Genève
  • Ecole Polytech. Fed. Lausanne
  • Università Degli Studi Di Padova 
  • Sony France
  • Ecole des Hautes Etudes en Sciences Sociales
  • Assoc pour la Création et la Recherche Outils d'Expression
  • Centre National de la Recherche Scientifique
  • Université Montpellier-1

Learn by doing

Chapel Hill, Oct. 23rd

slide9

Fraunhofer IIS Erlangen

Pisa

CEIT

Stanford U.

U. Southern California

CEIT

Chapel Hill, Oct. 23rd

labein

Queen’s University of Belfast

Labein, Bilbao

University of Ottawa

MIT, Boston

Labein

Chapel Hill, Oct. 23rd

recent activities
Recent activities
  • P2P visualization & NURBS (2000-02, U. Basque Country)
  • Collisions in mech. Assembly (2001-05, CEIT)
  • Occlusion culling (2003-07, CEIT)
  • Improving haptic perception (2006---, CEIT)
  • Collaborative haptics (04-07, Labein)
  • Avatars (04---, Vicomtech)
  • Learning Procedural Skills : link IA & VR (07---, U. Basque Country - U. Navarre)

Chapel Hill, Oct. 23rd

let us go to the past 1986
Let us go to the past :1986

Chapel Hill, Oct. 23rd

outline13
Outline
  • Research environment
  • Reality show or trustable impostor
  • Recent research activities
  • Your input & discussion

Chapel Hill, Oct. 23rd

reality show or trustable impostor
Reality show or trustable impostor
  • Applications
  • Users, costumers
  • Reality show ?
  • Impostors : interface contract
  • Trustable impostors everywhere
  • Great Expectations
    • Consumer haptics
    • Networked haptics
  • Summing up

Chapel Hill, Oct. 23rd

applications
Applications
  • Research
    • Physic based research
    • Application oriented research
  • Physics and Maths are the basis of research
  • Science must also appreciate Applications :
    • Appraise applied science and engineering !
    • Steer knowledge to a good application !

Chapel Hill, Oct. 23rd

applications spreadsheets
Applications : spreadsheets
  • David Alan Grier (1979)
    • “This machine has everything you can find on a real mainframe: multiprocessing, report generators, Cobol. If it were only a small mainframe, there would be no reason to get it, because it is as slowas bad plumbing. However, it has one piece of software. This, my friend, is a spreadsheet and it is going to change the world. Without spreadsheets, these machines are nothing. With spreadsheets, they are unstoppable.” (source, Computer, sept 2007, pg 6)

Chapel Hill, Oct. 23rd

applications users
Applications & users
  • Windows interface metaphor
    • Xerox
    • Apple
    • Users
  • Apps target user domains of different size
    • Specific domains (training, simulation, modeling, … )
    • Broad domains (Consumer oriented : games, “desktop” I/F, co-presence, …)
  • Always
    • pleased users are the key for successful applications

Chapel Hill, Oct. 23rd

a personal experience discovering customers
A personal experience :discovering customers
  • A sad story : ADAMS/Real -Time Kinematics
  • 1994 : 3 weeks from CEIT to MDI
    • Jeff Cooper (MDI, Mechanical Dynamics Inc, Ann Arbor MI)
  • The happy one : ADAMS/Animation
    • I learnt a new point of view : “customers” (users)
    • 2-3 K licenses

Chapel Hill, Oct. 23rd

discovering customers
… (discovering customers)
  • Both applications (“products”) were :
    • Easy of use
    • Quite good “cost / performance” ratio
    • So, … why this success difference?
  • ADAMS/Animation
    • conquered users’ expectations

Chapel Hill, Oct. 23rd

revima developed at ceit
REVIMA (developed at CEIT)
  • 2000-04 Collaboration with CEIT
    • Installed & used successfully
    • However, it did not replace the space mouse (haptic competitor)  desk is more comfortable
    • IEEE Computer Graphics & Applications Dec. 2004
    • “Minority Report” Steven Spielberg 2002 film

www.donnarosenartists.com

artist Dale Rutter

www.ceit.es

Chapel Hill, Oct. 23rd

reality show
Reality Show ?
  • Is the realism of visual or haptic rendering the key for success ?
  • Who generates the most “realistic” images ?
    • Sony’s Playstation 3 ?
    • Microsoft’s Xbox 360 ?
    • Nintendo´s Wii  clearly, doesn’t
  • So, why did the Wii succeed ? …..
    • Why do users enjoy more the Wii ?
    • The Wii conquered users unconscious wishes
    • How ?

Chapel Hill, Oct. 23rd

impostors lead the wii to success
Impostors lead the Wii to success
  • Does the Wii replicates reality ?
  • Games for the Wii : Trustable Impostors
    • An impostor “replaces” something
    • Replaces a real :golf club, baseball bat, bowling ball, racket
    • Users trust (accept) their behavior

Chapel Hill, Oct. 23rd

impostors replacement restrictions
Impostors : replacement restrictions
  • There is not an absolute replacement
    • Impostors can be used to achieve some goals
    • They do not replace playing grounds
    • These are not flaws, they are an Interface Contract
    • Impostors are accepted “as they are”, because they fulfill users' expectations

Insertar FOTO juego real

Chapel Hill, Oct. 23rd

trustable impostors everywhere
Trustable Impostors everywhere
  • Real time Computer Graphics:
    • Fluid flows
    • Cloth
    • Faked shadows and reflections
    • Herd motion
    • Lighting
    • Vegetation
  • Simulation
    • Gravity used to fake acceleration

Chapel Hill, Oct. 23rd

trustable impostors everywhere25
… ( Trustable Impostors everywhere )
  • Haptic systems
    • Deformable environments : body tissue
    • Comfortable inspection
    • Pseudo-haptics
  • Impostors everywhere :
    • Models “substitute” (real) entities
    • Algorithms “substitute” physical laws
      • Mathematical formulations
      • Heuristics

Chapel Hill, Oct. 23rd

interface contract for haptic systems
Interface Contract for haptic systems
  • Impostors are conditioned by hardware specifications, models and algorithms.
    • Stiffness (mechanical apps)
    • Force limits (weight, tighten, push, ...)
    • Position precision
  • Haptic systems require interface contract
    • Conditions of use (usability domain)

analyses must be performed !!!

    • Perception
    • Skills achievement

Chapel Hill, Oct. 23rd

90 s great expectations 3d visualization
90’s Great Expectations : 3D Visualization
  • 1991 : Jim Clark (Silicon Graphics)
    • “He also made some interesting predictions for the low end. He described the multimedia machine of the future as a device integrating the capabilities of (1) full 3D, interactive, real-time computer graphics, (2) full motion video, (3) image processing capabilities, (4) fully integrated geometric text, and (5) full compact-disc digital sound. He predicts that this will be available in a portable notebook-sized device with motion sensors in the next five to ten years for under $5,000.” (Source: Neville Holmes, Computer, sept 2007, pg 11)

Chapel Hill, Oct. 23rd

great expectations consumer haptics
Great expectations : consumer haptics
  • A haptic device as spread and affordable as the Wii or the GPU ?
    • 3 dof seems available
    • 6 dof and multipoint devices are further away
  • Which performance ?
    • Usability domain
  • Which user expectations will they be able to fulfill ?

 Which applications should be developed ?

Chapel Hill, Oct. 23rd

great expectations networked haptics
Great expectations : networked haptics
  • Feb. 2007 : Sipping beers with Jarek Rossignac

Q- collaborative haptics ?

That’s OK.

But … which is its use ?

A- Mechanical assembly …

(Jarek : skeptical glance)

A- feel mutual contact …

(Jarek : keen glance)

  • Co-presence awareness
    • Toast, handshake,
    • Mutual contact …
    • Feel physical presence in the collaborative working environment

Chapel Hill, Oct. 23rd

reality show and trustable impostors
Reality show AND trustable impostors
  • We must discover unconscious users’ expectations
    • And fulfill them
  • “Reality” must be defined by an Interface contract
    • Users must trust (accept) app. behavior

 Conditions of use must be well specified

 Perform more perception and skills achievement analyses

  • Cheap haptic devices make possible new challenges
    • May new haptic based metaphors replace the desktop ?
    • Can haptic devices outperform the mouse ?
    • Which I/F mechanisms can increase co-presence awareness ?

Chapel Hill, Oct. 23rd

outline31
Outline
  • Research environment
  • Reality show or trustable impostor
  • Recent research activities
  • Your input & discussion

Chapel Hill, Oct. 23rd

recent activities32
Recent activities
  • P2P visualization & NURBS (2000-02, U. Basque C.)
  • Intell. tutors + 3D visualization (00-05, U. Basque C.)
  • Collisions in mech. Assembly (00-04, CEIT)
  • (1) Occlusion culling (03-07, CEIT)
  • (2) Collaborative haptics (04---, Labein)
  • Avatars (04---, Vicomtech)
  • (3) Improving haptic perception (06---, CEIT)
  • IA & VR : Learning Procedural Skills (06---,

U. Basque C. - U. Navarre)

Chapel Hill, Oct. 23rd

1 @ ceit simulation group
(1) @ CEIT - Simulation group

Length 5.0 feet (1.5 m)

Radius 2.6 feet (0.8 m)

ITP supplies turbines to Rolls-Royce

Chapel Hill, Oct. 23rd

multidisciplinar group on haptics

Haptic

response

Collision

+ Contact

data

Image

generation

Control

USER

Other

simulations

Multidisciplinar group on haptics

2007 :IEEE Int. Conf. on Robotics and Automation

2004 :Comp Graphics Forum

2008 :IEEE Trans. on Control Systems Technology

Haptic design & building

2004 :IEEE Comp Graph & APP

2008 :Computer Animation and Virtual Worlds

Chapel Hill, Oct. 23rd

occlusion culling environment
Occlusion culling : environment
  • Virtual environment
    • Many objects
    • Objects not far from eye
    • Low occlusion
  • Cannot use
    • Conventional LOD
    • “Background texture” replac.

 Improve occ. cull.

Chapel Hill, Oct. 23rd

occlusion culling learnt experiences
Occlusion culling : learnt experiences
  • Many coherence mechanisms analyzed
    • Using most of them
    • Surprisingly stereo (eye2eye)

coherence did not improve

performance … why ?

  • Low occ. scenes 40%
    • Speed ups achieved
  • OC as a LOD mechanism 

Chapel Hill, Oct. 23rd

occlusion culling learnt experiences37
Occlusion culling : learnt experiences
  • OC as a LOD mechanism
    • image relevance
    • Occlusion ratio :
      • visible pixels / projected pixels
    • A new GPU query is required
    • GPU can be easily extended

Occlusion Ratio scheme

if ( Occlusion_Ratio < threshold &

visible pixels < 0.15% drawing area )

then draw simplified object

else draw object normally

Chapel Hill, Oct. 23rd

2 @ labein
(2) @ Labein

Collaborative Assembly Simulator

Labein (Spain) & Queen’s University Belfast

Chapel Hill, Oct. 23rd

HAVE’2007 , Ottawa, Oct. 13-14

learnt experiences
Learnt experiences
  • Collaborative haptics (each user holds one object)

[ Collaborative ≠ Cooperative two users hold the same object ]

    • Independent interaction  similar to visualization
    • Dependent interaction
      • Collisions co-presence
      • Assembly : constraints, network haptic response
    • Experiments : Labein - Queen’s U. Belfast
    • P2P & Scalability

Chapel Hill, Oct. 23rd

current research motion prediction
Current research : motion prediction
  • Local haptic (not networked)
    • 5 years ago : 40ms/frame – coll. computing
    • Where will be the object when the collision computations are done ?
    • Free movement vs. contact movement

instabilities ?  stiffness dependent ?

    • Currently 2-3ms.  no relevant
  • Collaborative haptics (50-200ms delays)
    • promising

Chapel Hill, Oct. 23rd

3 @ ceit
(3) @ CEIT
  • Improving haptic perception
    • Surface discontinuities (edges, holes, thin elements, …)

 oscillations

    • Surface normal
    • Penetration
    • Contact point

Chapel Hill, Oct. 23rd

your input discussion
Your input & discussion

Thanks for your attention Muchas gracias Eskerrik asko (Basque language)

Donostia

Saint Sebastian

Chapel Hill, Oct. 23rd